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prctl: Introduce PR_MTE_STORE_ONLY

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PR_MTE_STORE_ONLY is used to restrict the MTE tag check for store
opeartion only.

Signed-off-by: Yeoreum Yun <yeoreum.yun@arm.com>
Reviewed-by: Mark Brown <broonie@kernel.org>
Tested-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20250618092957.2069907-3-yeoreum.yun@arm.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Yeoreum Yun 2025-06-18 10:29:51 +01:00 committed by Catalin Marinas
parent 33e943a228
commit b1fabef37b
1 changed files with 2 additions and 0 deletions
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include/uapi/linux/prctl.h
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@ -244,6 +244,8 @@ struct prctl_mm_map {
# define PR_MTE_TAG_MASK (0xffffUL << PR_MTE_TAG_SHIFT) # define PR_MTE_TAG_MASK (0xffffUL << PR_MTE_TAG_SHIFT)
/* Unused; kept only for source compatibility */ /* Unused; kept only for source compatibility */
# define PR_MTE_TCF_SHIFT 1 # define PR_MTE_TCF_SHIFT 1
/* MTE tag check store only */
# define PR_MTE_STORE_ONLY (1UL << 19)
/* RISC-V pointer masking tag length */ /* RISC-V pointer masking tag length */
# define PR_PMLEN_SHIFT 24 # define PR_PMLEN_SHIFT 24
# define PR_PMLEN_MASK (0x7fUL << PR_PMLEN_SHIFT) # define PR_PMLEN_MASK (0x7fUL << PR_PMLEN_SHIFT)